a white house aide said mr. obama was impressed by his courage. first lady michelle obama tweeted "we've got your back." john and diana? >> all right, deavin, what's net for collins? does he intend to keep playing? >> reporter: he plays for the washington wizards, now a free agent. it's still unclear whether a team will pick him up for next season, but collins says he's ready to play and that all this attention will motivate him to work harder. john and diana. >> all right, devin dwyer in washington, thank you. >>> there is, of course, much more to the story. that exclusive interview with jason collins coming up on "good morning america." >>> all right, now to the latest in the boston bombing. investigators have discovered female dna on one of the bombs used in the attack. >> sources say it's still unclear whether it is from a victim of the attack, someone who handled components of the bomb before it was put together or someone who helped build that bomb. the fbi wants to take dna evidence from the widow of tamerlan tsarnaev. >> now, as for his br